package lesson.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import lesson.entity.ChinaTotal;
import org.apache.ibatis.annotations.Select;

/**
 * @Description:
 * @Author: Wanzhen
 * @Date: 2022/6/12-11:50
 */
public interface ChinaTotalMapper extends BaseMapper<ChinaTotal> {

    @Select("select max(id) from china_total")
    Integer maxId();

}
